Yeah... I have been eyeing the DGX Gears 25 # donut wing, wondering if I could just get by with that for all my single tank diving, and then sell my 30# wing. Then I look at the Hog 23 # wing, which is just a little more expensive and has a built-in STA-like deal to keep the tank from rolling and think I should get that instead. I am not considering the DSS wing just because it is not field-repairable - well, that and the others are way less expensive, and the DGX wing has, from what I can tell, the best warranty in the industry, bar-none.
OTOH, since I will occasionally dive a steel, in a 7mm, in fresh water, I should probably just keep my 30 # wing....